Aeroplane



A. AHLBRECHT.

AEROPLANE.

APPLICATION FILED OCT. 15. I919.

1,37 1,592. Patented Mar; 15, 1921.

' WITNESSES mvemon PATENT OFFICE.

AUGUST AHLBRECHT, OF PITTSBURGH, PENNSYLVANIA.

AEROPLAN E.

Application filed October 15, 1919.

To all whom it may concern:

Be it known that 1, AUGUST AHLBRnoHr, a citizen of theUnited States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Aeroplanes, of which the following is a specification.

This invention relates to aeroplanes, more particularly to the construction of bi-planes of that type as disclosed in my application for Letters Patent filed March 27 1919, Serial No. 285,536, and besides embodying the objects and advantages as set forth in connection with the construction embodied in said application, has for its further object to improve the balancing planes whereby tilting of the vessel will be reduced to a minimum especially when descending.

Further objects of the invention are to provide an aerial vessel which is simple in its construction and arrangement, strong, durable, efiicient in its use, readily set up, and comparatively inexpensive.

With the foregoing and other objects in view the invention consists of the novel construction, combination and arrangement of parts, as hereinafter more specifically described and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which come within the scope of the claims hereunto appended.

In the drawings wherein like reference characters denote corresponding parts throughout the several views Figure 1 is an elevation of an aeroplane in accordance with this invention, and

Fig. 2 is a top plan of the balancing 7 planes.

Referring to the drawings in detail 1 denotes generally a stabilizing structure of a construction similar to that disclosed'in my application Serial Number 285,536 and it is thought unnecessary to specifically describe the same. The structure 1 is supported from the frame 2 of the vessel.

Carried by the frame 2 is the lower sustaining plane 3, the intermediate sustaining plane 4, and the upper sustaining plane Specification of Letters Patent.

Patented Mar. 15, 1921. Serial No. 330,914.

5. The planes 4 and 5 are provided with outwardly and upwardly inclined rigid balancing planes or wings 6, and'the plane 4 1s furthermore provided with rigid deflectors extending outwardly from said plane 4 and positioned below openings in the wings 6 of the plane 4. The deflectors are indlcated at 7 and the openings in the wings at 8. The construction set forth is similar to that disclosed in the application referred to.

Centrally and oppositely inclined balanc- 1ng planes 9 are secured with the frame 2 and extend down through the central or tion of the upper sustaining plane 5. he planes 9 are secured together at their lower ends and extend above the plane 5, and each plane 9 in proximity to and above the plane 5 is formed with an opening 10. A horizontal plane 11 connects the upper ends of the planes 9 together and the plane 11, in connection with the planes 9, forms a triangular shaped balancing element. The plane 11 centrally thereof is provided with an oval shaped opening and extending upwardly from the plane 11, as well as registering with the opening 12 of the plane 11 is a sleeve 13 through which an induced current is created during the travel of the vessel and which tends to prevent tilting.

What I claim is 1. An aeroplane comprising an upper sustaining plane provided centrally with an upwardly extending triangular shaped and open balancing element and including an upwardly extending sleeve opening into the interior of the element at its upper portion.

2. An aeroplane comprising an upper sustaining plane provided centrally with an upwardly extending balancing element open at each end and having its top provided with an upwardly extending sleeve opening into the interior of the element at its upper portion. I

3. An aeroplane comprising an upper sustaining plane provided with an inverted balancing element open at each end and having its top provided with an oval shaped sleeve opening into the interior of said element at its upper portion, said element being tri-angular in contour.

4. An aeroplane comprising an upper sustainmg plane having the central portion thereof cut away, a triangular shaped balancing element extended into said cutaway 5 portion and projecting above said plane and further supported fromend secured to the plane at each side of theeutaway portion,

and a sleeve secured to the said eiement at the top thereof and opening at its lower end into the interior of said element at its upper 10 portion.

In testimony whereof I a-fiix my signature.

AUGUST AEHLBRECHT. 

